Comparative analysis of adaptive systems for automatic stabilization of the water level in the drum boiler

Abstract

The comparative analysis of two kinds of adaptive systems for automatically maintaining the water level in the drum of large boilers of thermal power plants is carried out with the stabilization of their dynamic characteristics in the face of changing parameters of the control object. The analysis is carried out with the purpose of determining the most effective adaptation method and development on its basis, a typical local adaptive automatic control system for various paths of energy steam boilers. As a control object, for example, the drum boiler feed circuit is selected because the process of changing the water level in the drum due to a violation of the material balance between water supply and water consumption is the most responsible and complicated due to the astatic type of its transfer function. Both systems are unidentified and contain a reference model in the adaptation loop. The advantages and disadvantages of the analyzed systems and the prospects for the application of adaptation methods laid down based on their construction are established.